تقرير
Injection Locking and Noise Reduction of Resonant Tunneling Diode Terahertz Oscillator
| العنوان: | Injection Locking and Noise Reduction of Resonant Tunneling Diode Terahertz Oscillator |
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| المؤلفون: | Hiraoka, Tomoki, Arikawa, Takashi, Yasuda, Hiroaki, Inose, Yuta, Sekine, Norihiko, Hosako, Iwao, Ito, Hiroshi, Tanaka, Koichiro |
| المصدر: | APL Photonics 6, 021301 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Applied Physics, Physics - Optics |
| الوصف: | We studied the injection-locking properties of a resonant-tunneling-diode terahertz oscillator in the small-signal injection regime with a frequency-stabilized continuous THz wave. The linewidth of the emission spectrum dramatically decreased to less than 120 mHz (HWHM) from 4.4 MHz in the free running state as a result of the injection locking. We experimentally determined the amplitude of injection voltage at the antenna caused by the injected THz wave. The locking range was proportional to the injection amplitude and consistent with Adler's model. As increasing the injection amplitude, we observed decrease of the noise component in the power spectrum, which manifests the free-running state, and alternative increase of the injection-locked component. The noise component and the injection-locked component had the same power at the threshold injection amplitude as small as $5\times10^{-4}$ of the oscillation amplitude. This threshold behavior can be qualitatively explained by Maffezzoni's model of noise reduction in general limit-cycle oscillators. Comment: The following article has been submitted to APL Photonics |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/5.0033459 |
| URL الوصول: | http://arxiv.org/abs/2101.04828 |
| رقم الأكسشن: | edsarx.2101.04828 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/5.0033459 |
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